Provide a convenient way to log arbitrary text in Drydock without needing structured log classes

Summary: Depends on D19673. Ref T13197. See PHI873.

Test Plan:
Added some code like this:

```
$operation->logText('Nice convenient text logging.');
```

...then got:

{F5887712}

Reviewers: amckinley

Reviewed By: amckinley

Subscribers: PHID-OPKG-gm6ozazyms6q6i22gyam

Maniphest Tasks: T13197

Differential Revision: https://secure.phabricator.com/D19674

src/__phutil_library_map__.php

@@ -1206,6 +1206,7 @@ phutil_register_library_map(array(
     'DrydockSlotLockException' => 'applications/drydock/exception/DrydockSlotLockException.php',
     'DrydockSlotLockFailureLogType' => 'applications/drydock/logtype/DrydockSlotLockFailureLogType.php',
     'DrydockTestRepositoryOperation' => 'applications/drydock/operation/DrydockTestRepositoryOperation.php',
+    'DrydockTextLogType' => 'applications/drydock/logtype/DrydockTextLogType.php',
     'DrydockWebrootInterface' => 'applications/drydock/interface/webroot/DrydockWebrootInterface.php',
     'DrydockWorker' => 'applications/drydock/worker/DrydockWorker.php',
     'DrydockWorkingCopyBlueprintImplementation' => 'applications/drydock/blueprint/DrydockWorkingCopyBlueprintImplementation.php',
@@ -6620,6 +6621,7 @@ phutil_register_library_map(array(
     'DrydockSlotLockException' => 'Exception',
     'DrydockSlotLockFailureLogType' => 'DrydockLogType',
     'DrydockTestRepositoryOperation' => 'DrydockRepositoryOperationType',
+    'DrydockTextLogType' => 'DrydockLogType',
     'DrydockWebrootInterface' => 'DrydockInterface',
     'DrydockWorker' => 'PhabricatorWorker',
     'DrydockWorkingCopyBlueprintImplementation' => 'DrydockBlueprintImplementation',

src/applications/drydock/logtype/DrydockTextLogType.php

@@ -0,0 +1,27 @@
+<?php
+
+/**
+ * Simple convenience log type for logging arbitrary text.
+ *
+ * Drydock logs can be given formal types, which allows them to be translated
+ * and filtered. If you don't particularly care about fancy logging features,
+ * you can use this log type to just dump some text into the log. Maybe you
+ * could upgrade to more formal logging later.
+ */
+final class DrydockTextLogType extends DrydockLogType {
+
+  const LOGCONST = 'core.text';
+
+  public function getLogTypeName() {
+    return pht('Text');
+  }
+
+  public function getLogTypeIcon(array $data) {
+    return 'fa-file-text-o grey';
+  }
+
+  public function renderLog(array $data) {
+    return idx($data, 'text');
+  }
+
+}

src/applications/drydock/storage/DrydockRepositoryOperation.php

@@ -203,6 +203,14 @@ final class DrydockRepositoryOperation extends DrydockDAO
     return $this->getProperty('exec.workingcopy.error');
   }
 
+  public function logText($text) {
+    return $this->logEvent(
+      DrydockTextLogType::LOGCONST,
+      array(
+        'text' => $text,
+      ));
+  }
+
   public function logEvent($type, array $data = array()) {
     $log = id(new DrydockLog())
       ->setEpoch(PhabricatorTime::getNow())